CN201075153Y

CN201075153Y - Multi-focus glasses lens for close range advance gradually in wide visual field

Info

Publication number: CN201075153Y
Application number: CNU2007201546808U
Authority: CN
Inventors: 黄哲杉
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-15
Filing date: 2007-05-15
Publication date: 2008-06-18
Anticipated expiration: 2017-05-15
Also published as: US20080284977A1

Abstract

The utility model provides a wide-view middle and near distance gradual multiple focus eyeglass, belonging to eyeglasses or protection eyeglass which has the same characteristic with the eyeglasses. The utility model comprises a short-distance view area and a transition area. The utility model is characterized in that the gradual surface of the eyeglass is sequentially provided with a middle distance view area, the transition area and the short distance view area, which have different dioptres. The width of the narrowest view channel of the transition area is ranging from 18mm to 20mm; the length from below the central line of the eyeglass to the short-distance view area is 10mm. The eyeglass has wider transition area view channels and 6 focuses which are distributed reasonably. The utility model can effectively improve the view range of the wearer, increase the wideness and the definition of view, reinforce wearing comfort, and can effectively eliminate eyesight harm which is caused by unreasonable fitting of the eyeglass. The eyeglass can be used for correcting presbyopia, especially for the presbyopia correction of middle and short distances.

Description

Progressive multi-focus lens closely in a kind of wide visual field

Technical field

The utility model belongs to glasses or with glasses the protection glass of identical characteristics is arranged, and is specifically related to a kind of multifocal lens closely progressive in the wider field of view that has.Its optical design with look photoproduction reason and combine and can produce comfortable visual effect.

Background technology

The vision health problem that enters 40 years old later the elderly is the physiological phenomenon that can't avoid, monochromatic light read eyeglass and two light microscopics etc. obviously the eyeglasses of expression " presbyopia " vestiges gone up by some images and psychologically all younger the elderly refuse, the lens of one-light has only a focus to see single focal length simultaneously, in order to make the eyes of wearing not only be used for reading, writing, also can be used for the observation of extraneous different distance environment, thereby make the progressive multifocal eyeglass become the important step of correcting presbyopia.

The principal character of progressive multifocal eyeglass is: looking between the near reading range of fixing below far field and the eyeglass of eyeglass upper fixed one section refractive power continually varying transitional region is arranged, in this zone, reach the increase gradually of eyeglass refractive power by diminishing gradually of eyeglass radius-of-curvature.The wearer can avoid monochromatic light to read mirror reversal and put on the trouble of taking again, and can rationally arrange focus by the human action when looking thing, realizes far away, in-plant visual accommodation.But some principal characters of progressive multifocal eyeglass and parameter are interrelated, interactional, comprise the area size of looking far field and near reading range, the length of transition region and vision available width are used the zone and are out of shape the compromise and the compromise scheme that must exist between the astigmatic zone to a certain degree.The distortion astigmatism is the key issue that gradual-change multi-focus lens is difficult to overcome.Though test and join proper gradation zone and can give the wearer eyesight clearly, but will produce one-tenth distortion of image to a certain degree in the gradation zone both sides, its deformation extent and deformation direction depend on the depth of the different and additional number of degrees of lens design, to leave central area, available transition region far away more when eyeball, becomes distortion of image just obvious more.

Because the utilization of numerically-controlled machine, according to the Silk Road, Soviet Union take, well-known eyeglass such as Cai Shi manufacturer all designs the people that multiple multifocal spectacle lenses wears presbyopia glasses to needs, as Fig. 1 and Fig. 2, this multifocal spectacle lenses comprises long distance vision area 1, low coverage vision area 3, zone of transition 2 and aberration confusion region 4; Eyeglass top vertex lens power minimum is the long distance vision area, eyeglass bottom vertex lens power is the low coverage vision area to the maximum, the downward vertex lens power of long distance vision area progressively increases, the zone of transition that progressively increases for vertex lens power between long distance vision area and the low coverage vision area, and being distributed in the zone of transition both sides is the aberration confusion region.General commercially available multifocal spectacle lenses sight line passage length is generally at 23～24mm, width of transition zone from the long distance vision area to the low coverage vision area is generally 6～7mm, center line is being 14mm down to low coverage vision area central point length, intensive this visual field passage area that vertically is distributed in of a plurality of focus areas of multifocal spectacle lenses, being easy to generate luminosity beats, again because the sight line passage is narrow, vision can cause sense of discomfort by this zone, more because the dimness of vision district of both sides is a transitional region near this visual channel too, often cause visual discomfort, imaging distortion is being advanced or is being caused falling during going up or down stairway and cause unexpected injury.

The utility model content

Fundamental purpose of the present utility model is to provide a kind of optical design perfection, zone of transition visual range broad and with look photoproduction reason combine produce comfortable visual effect in progressive multi-focus lens closely in the closely all suitable wide visual field.The zone of transition that has solved existing progressive multi-focal eyeglass is narrow, is easy to generate the problem of looking thing distortion and many focuses unreasonable distribution.

For achieving the above object, the technical solution adopted in the utility model is as follows:

Progressive multi-focus lens closely in a kind of wide visual field, comprise low coverage vision area and zone of transition, the progressive surface that it is characterized in that described eyeglass set gradually have different dioptric in apart from vision area, zone of transition and low coverage vision area, the narrowest visual channel width of zone of transition is 18～20mm, and described center of lens line is being 10mm down to low coverage vision area length.

Concretely, the visual channel width of the described low coverage vision area of this progressive multi-focus lens is 24mm.

Set gradually the focus of six progressively transition that draw near in described apart from vision area, zone of transition and low coverage vision area, focus is positioned at center of lens line top 10mm to center of lens line below 10mm scope.

First focus apart from vision area the top in described is the middle distance sighting distance, second focus is positioned at center of lens line top 2mm, the 3rd focus is positioned at 2mm place, center of lens line below, the 4th focus is positioned at 4mm place, center of lens line below, the 5th focus is positioned at 7mm place, center of lens line below, and the 6th focus is positioned at 10mm place, center of lens line below.

The visual channel width at described second focus and the 3rd focus place is 18～20mm, and the vision width of described the 5th focus and the 6th focus is 24mm.

The dioptric adjacent amplitude of variation of described six focuses from top to bottom waits amplitude to increase successively, and increasing degree is 0.25D.

Described zone of transition both sides are distributed with soft confusion region, and soft confusion region is symmetrically distributed, and the two most proximal end distance is 18～20mm.

Described eyeglass is optical resin material or poly-carbon ester optical grade material structure, and forms the progressive eyeglass of a plurality of focuses on eyeglass.

By the perfect number controlled machine, form the configuration of whole many focus areas at glass mold or steel mold concave surface with accurate numerical control progressive additional data, method through moulding by casting or press mold moulding makes the optical material curing molding, can obtain this multifocal lens, it can adopt optical resin material or polycarbonate optical grade material.

In this wide visual field closely the zone of transition channel width of progressive multi-focus lens be more than the 18mm, be three times of zone of transition passage of existing product, sight line can be seen broad comfortable object by 3 focuses in this district, avoids because of the sensible narrow imaging distortion that causes of zone of transition.Use the object distance of looking commonly used of focus frequency and eyes from doing the ideal designs configuration through actual average to eyeglass on human eye and the mirror holder, the reasonable distribution of six focuses, can eliminate the discomfort that the increase of the progressive number of degrees causes greatly, can be comfortable read (0.3～0.5m), play computer, see TV or talk with friend (0.5～2.0m), participate in a conference (2.0～2.5m), (2.5～4.0m) to look thing clear for indoor, outdoor middle distance.The visual channel width of this eyeglass the 5th focus and the 6th focus increases to more than the 24mm, the following focal length of center line is shorter, read, write, beat computer, reading newspaper all can get a clear view entirely, and need not improve head also not eyeball can comfortablely see object clearly downwards.

The beneficial effects of the utility model are, in this wide visual field closely progressive multi-focus lens have the zone of transition visual channel of broad and the reasonable distribution of 6 focuses, can effectively improve wearer's visual range, increase sight line broadness degree and sharpness, strengthen and wear comfort, and can effectively eliminate existing eyeglass and join the unreasonable eyesight injury that causes because of testing.This eyeglass can be used for presbyopia to be corrected, particularly in, in-plant presbyopia corrects.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is further elaborated.

Fig. 1 is the vision area and the access diagram of existing multifocal lens;

Fig. 2 is apart from vision area and focus distribution synoptic diagram among Fig. 1;

Fig. 3 is vision area of the present utility model and access diagram;

Fig. 4 is apart from vision area and focus distribution synoptic diagram among Fig. 3.

Embodiment

As Fig. 3, Fig. 4, in this wide visual field closely progressive multi-focus lens be that resin optical material is made, the soft confusion region 4 that distributes apart from vision area 1, low coverage vision area 3, zone of transition 2 and zone of transition both sides in being divided into, middle progressive successively at this lens surface apart from vision area, the different diopters of zone of transition with the low coverage vision area, the narrowest visual channel width of zone of transition is 18mm, and this eyeglass lens measurement center line is being 10mm down to low coverage vision area length.The soft confusion region that the zone of transition both sides distribute is symmetrically distributed, and the most proximal end distance is 18mm.

The middle focus that apart from vision area, zone of transition and low coverage vision area in set gradually six draw near progressively transition of this eyeglass lens measurement center line top 10mm to the center of lens line 5 below 10mm scopes, these focus distribution are as follows: middle is the middle distance sighting distance apart from vision area first focus 6 topmost, second focus 8 is positioned at center of lens line top 2mm, the 3rd focus 9 is positioned at 2mm place, center of lens line below, the 4th focus 10 is positioned at 4mm place, center of lens line below, the 5th focus 11 is positioned at 7mm place, center of lens line below, and the 6th focus 7 is positioned at 10mm place, center of lens line below.The dioptric amplitude of variation of the adjacent focal spots of six focuses from top to bottom increases successively, and increasing degree is 0.25D.And the visual channel width at second focus and the 3rd focus place is 18mm, and the visual channel width of the 5th focus and the 6th focus is 24mm.

The person is an example just to have begun to wear the presbyopia glasses with a middle age, 10mm on eyesight starting point 0.000D (zero diopter) the centre line, just in time behave can see when at eye level in addition remote.Down 8mm is that the second focus 0.25D can see that focal length is 2.5～4.0 meters, the 2mm place is that the 3rd focus 0.50D can see 2.0～2.5 meters of focal lengths under the center line, the 4th focus 0.75D of 4mm place can see 1.0～2.0 meters of focal lengths under the center line, the 7mm place is that the 5th focus 1.00D can see 0.5～1.0 meter of focal length under the center line, 10mm place under the center line, the 6th focus 1.25D can see 0.3～0.5 meter of focal length.

Claims

1. progressive multi-focus lens closely in the wide visual field, in comprising apart from vision area, low coverage vision area and zone of transition, the progressive surface that it is characterized in that described eyeglass set gradually have different dioptric in apart from vision area, zone of transition and low coverage vision area, the narrowest visual channel width of zone of transition is 18～20mm, and described center of lens line is being 10mm down to low coverage vision area length.

2. progressive multi-focus lens closely in a kind of wide visual field according to claim 1 is characterized in that the visual channel width of described low coverage vision area is minimum and is 24mm.

3. progressive multi-focus lens closely in a kind of wide visual field according to claim 1, it is characterized in that setting gradually the focus of six progressively transition that draw near apart from vision area, zone of transition and low coverage vision area in described, focus is positioned at center of lens line top 10mm to center of lens line below 10mm scope.

4. progressive multi-focus lens closely in a kind of wide visual field according to claim 3, it is characterized in that in described being the middle distance sighting distance apart from vision area first focus topmost, second focus is positioned at center of lens line top 2mm, the 3rd focus is positioned at 2mm place, center of lens line below, the 4th focus is positioned at 4mm place, center of lens line below, the 5th focus is positioned at 7mm place, center of lens line below, and the 6th focus is positioned at 10mm place, center of lens line below.

5. progressive multi-focus lens closely in a kind of wide visual field according to claim 3 is characterized in that the dioptric adjacent amplitude of variation of described six focuses from top to bottom waits amplitude to increase successively, and increasing degree is 0.25D.

6. progressive multi-focus lens closely in a kind of wide visual field according to claim 4 is characterized in that the visual channel width at described second focus and the 3rd focus place is 18～20mm, and the visual channel width of the 5th focus and the 6th focus is 24mm.

7. progressive multi-focus lens closely in a kind of wide visual field according to claim 1 is characterized in that described zone of transition both sides are distributed with soft confusion region, and soft confusion region is symmetrically distributed, and the two most proximal end distance is 18～20mm.

8. progressive multi-focus lens closely in a kind of wide visual field according to claim 1 is characterized in that described eyeglass is optical resin material or poly-carbon ester optical grade material structure, and forms the progressive eyeglass of a plurality of focuses on eyeglass.